Applies when: Entering a permit-required confined space

• ✓Verify a valid confined-space entry permit.
• ✓Review all hazards and controls listed on the permit.
• ✓Stop entry and reassess the permit if conditions change.

• ✓Test oxygen first, then flammable and toxic gases.
• ✓Sample the top, middle and bottom of the space.
• ✓Record results on the permit and verify acceptable limits.

• ✓Identify every energy and material-flow source.
• ✓Apply LOTO, blanking or positive physical isolation.
• ✓Verify zero-energy status before entry.

Applies when: Throughout permit-required entry

• ✓Maintain a trained attendant throughout the entry.
• ✓Track the number and condition of all entrants.
• ✓The attendant must remain at the post without conflicting duties.

Applies when: The entry control plan requires ventilation

• ✓Use suitable ventilation supplying clean air.
• ✓Keep air intakes away from exhausts and contaminant sources.
• ✓Evacuate if required ventilation stops, then reassess the permit.

• ✓Maintain continuous communication with the attendant.
• ✓Test radio, voice or visual methods before entry.
• ✓Evacuate immediately if communication is lost.

• ✓Prepare a workable rescue plan before entry.
• ✓Ensure the rescue service and space-suitable retrieval system are ready.
• ✓Never perform an unplanned or unprotected entry rescue.

Applies when: The atmosphere can change or the permit requires it

• ✓Continuously monitor when atmospheric conditions may change.
• ✓Verify detector alarm settings before work starts.
• ✓Evacuate immediately after any alarm, symptom or concern.